[jira] [Created] (SPARK-30012) Change classes extending scala collection classes to work with 2.13

["Sean R. Owen (Jira)" <ji...@apache.org>]

Sean R. Owen created SPARK-30012:
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             Summary: Change classes extending scala collection classes to work with 2.13
                 Key: SPARK-30012
                 URL: https://issues.apache.org/jira/browse/SPARK-30012
             Project: Spark
          Issue Type: Sub-task
          Components: Spark Core, SQL
    Affects Versions: 3.0.0
            Reporter: Sean R. Owen


Several classes in the code base extend Scala collection classes, like:

- ExternalAppendOnlyMap
- CaseInsensitiveMap
- AttributeMap
- (probably more I haven't gotten to yet)

The collection hierarchy changed in 2.13, and like elsewhere, I don't see that it's possible to use a compat library or clever coding to bridge the difference. I think we need to maintain two implementations in parallel source trees, possibly with a common ancestor with the commonalities.



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